This is thick paper (cardboard). The front is glossy white, and the back is gray. The size is 21.0cm x 29.5cm, which is almost A4 size (21cm x 29.7cm). The thickness is about 0.6mm. The number of sheets is 50. It is quite thick and I think it is easy to use. In addition to being used as thick paper, how about using it for handmade crafts, as backing paper or materials for creating works of art? *Please note that the wrapping paper used to package the product is reused due to the recent rise in paper prices. #paper goods #specialty paper #handmade #handmade materials #handmade supplies #papercraft #papercraft materials #papercraft supplies #craft punch #die cut #paper #cardboard #white cardboard #white paperboard #chipboard #chipboard paper #thick paper #craft #paperboard #backing paper #bookbinding #reinforcement #core material #protection #packaging #packing materials #card protection #book packaging #A4